3 years ago

A stone is thrown vertically upwards. It decelerates at a rate of 9.8m/s. It reaches a greatest

Physics

1 answer:

frez [133]3 years ago

5 0

Answer:

Explanation:

brainiest pls

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A skateboarder has an acceleration of −1.9 m/s2. If her initial speed is 6 m/s, how long does it take her to stop?

SSSSS [86.1K]

You said that she's losing 1.9 m/s of her speed every second.

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Answer: $8.76\times 10^{-3} min^{-1}$

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Given

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$-k\cdot (10^{10}=\ln 0.7$

$k=3.566\times 10^{-11}$

At this Point we want to compute $t_{0.5}\ i.e.\ y=0.5$

$0.5=1-e^{-kt^n}$

$0.5=e^{-kt^n}$

$0.5=e^{-3.566\times 10^{-11}\cdot (t)^5}$

taking log both sides

$\ln 0.5=-3.566\times 10^{-11}\cdot (t)^5$

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